From 9deed9edbf2d75961155c77b4c0e1b545b7d236b Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri, 10 May 2013 11:58:39 +0200
Subject: [PATCH] libtests/malloc04: Prevent compiler optimizations

---
 testsuites/libtests/malloc04/init.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/testsuites/libtests/malloc04/init.c b/testsuites/libtests/malloc04/init.c
index 89cbab327f..c1fc2367e1 100644
--- a/testsuites/libtests/malloc04/init.c
+++ b/testsuites/libtests/malloc04/init.c
@@ -41,7 +41,12 @@ void *rtems_heap_null_extend(
 #endif
 
 char Malloc_Heap[ 256 ] CPU_STRUCTURE_ALIGNMENT;
-int sbrk_count;
+
+/*
+ * Use volatile to prevent compiler optimizations due to the malloc() builtin.
+ */
+volatile int sbrk_count;
+
 Heap_Control TempHeap;
 
 size_t offset;